The 2020 Infiniti QX50 is available as a 4-door, 5-seat sport utility. Starting at $37,250, the 2020 Infiniti QX50 PURE FWD is powered by a 2.0L , 4 -cylinder engine mated to an automatic transmission that returns an EPA estimated 23-mpg in the city and 29-mpg on the highway. The top of the line 2020InfinitiQX50AUTOGRAPH AWD , priced at $ 55,850 , is powered by a 2.0L , 4 - cylinder engine mated to an automatic transmission that returns an EPA estimated 22-mpg in the city and 28-mpg on the highway.